v1.5.0

This release focussed on tuning the evaluation function ⚖️

The Web App version of Wasabi Chess can be played here.

Changes

• New tuning tool
• Tuned all evaluation parameters
• Replaced simple mobility score calculation with mobility score table
• Replaced simple king safety calculation with king threat score table
• Improved game phase calculation for tapered eval
• Added endgame piece square tables

Installation

• Download and unpack the archive for your platform (Linux or Windows 8/10)
• Configure your UCI client (e.g. PyChess, Arena, cutechess)
  • … on Windows ⇒ to run wasabi.cmd
  • … on Linux ⇒ to run wasabi

⚠️ the bundled WAVM runtime is not compatible with Windows 7 - a workaround is described in the Wiki

v1.4.0

This release contains many small improvements, but the largest ELO gain came from the new mobility evaluation 🤸

The Web App version of Wasabi Chess can be played here.

Changes

• Add mobility evaluation
• UCI: output mate distance as score when a mate was found
• Evaluation: provide bonus for pawns covering pawns and knights
• Adjust piece and move ordering values
• Slightly increase LMR threshold
• Simplify and tune futility margin calculation
• Directly jump to quiescence search for futile positions at depth 1

Installation

• Download and unpack the archive for your platform (Linux or Windows 8/10)
• Configure your UCI client (e.g. PyChess, Arena, cutechess)
  • … on Windows ⇒ to run wasabi.cmd
  • … on Linux ⇒ to run wasabi

⚠️ the bundled WAVM runtime is not compatible with Windows 7 - a workaround is described in the Wiki

v1.3.0

This release mainly focussed on improving king safety evaluations 👑

The Web App version of Wasabi Chess can be played here.

Changes

• Improved castling evaluation
• Improved king safety evaluation
• Tuned some evaluation parameters

Installation

• Download and unpack the archive for your platform (Linux or Windows 8/10)
• Configure your UCI client (e.g. PyChess, Arena, cutechess)
  • … on Windows ⇒ to run wasabi.cmd
  • … on Linux ⇒ to run wasabi

⚠️ the bundled WAVM runtime is not compatible with Windows 7 - a workaround is described in the Wiki

v1.2.1

This is the first public release of the standalone UCI engine 🌱

The Web App version of Wasabi Chess can be played here.

Changes

• Add GitHub Workflows for automated tests, builds and releases
• Update to AssemblyScript v0.10.0
• Improve error messages in UCI mode

Installation

• Download and unpack the archive for your platform (Linux/Windows) to a location of your choice
• Configure your UCI client (e.g. PyChess, Arena, cutechess)
  • … on Windows ⇒ to run wasabi.cmd
  • … on Linux ⇒ to run wasabi